A study with approximately 80 people found an association between higher reactivity to acute stress (as measured by salivary cortisol) and a more diverse gut microbiome.
Summary: https://neurosciencenews.com/gut-microbiome-acute-stress-reactivity-30537/
The title of the summary inappropriately implies causation.
Original paper: https://www.sciencedirect.com/science/article/pii/S2352289526000287





